𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Effect of lanthanide shift reagents on conformational equilibria

✍ Scribed by J. R. Dixon; P. S. McIntyre; I. G. Morris; D. L. Williams


Publisher
John Wiley and Sons
Year
1981
Tongue
English
Weight
174 KB
Volume
15
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis


Abstract

The conformational equilibrium constants for a series of 1‐alkyl substituted cyclohexanols have been determined using a lanthanide shift reagent, and the results compared with other methods. In comparison to other technique greater preference is shown by the hydroxyl group for the equatorial position. This is rationalized by the effect on the equilibrium of the bulky shift reagent.


📜 SIMILAR VOLUMES


Use of lanthanide shift reagents for the
✍ M. Hájek; P. Trška; L. Vodička; J. Hlavatý 📂 Article 📅 1977 🏛 John Wiley and Sons 🌐 English ⚖ 407 KB

## Abstract The position of the lanthanide atom calculated from the pseudocontact shift equation was studied for 2‐adamantanol and 2‐methyl‐, 2‐ethyl‐, 2‐propyl‐, 2‐butyl‐2‐adamantanol. The possible methods of calculation considering rotation of the methyl group were ascertained in the case of 2‐me

Lanthanide shift reagents. IX. Proton an
✍ David M. Rackham; Anthony F. Cockerill; Roger G. Harrison 📂 Article 📅 1978 🏛 John Wiley and Sons 🌐 English ⚖ 231 KB

## Abstract Highly specific proton line‐broadening and paramagnetic ^13^C shifts observed for N‐butyl‐N(4‐methyloxazol‐2‐yl)‐2‐methylpropionamide in the presence of fluorinated lanthanide shift reagents, are absent when non‐fluorinated reagents are used. This unusual behaviour is rationalized in te

trans–cis Isomerization of schiff's base
✍ L. M. N. Saleem 📂 Article 📅 1982 🏛 John Wiley and Sons 🌐 English ⚖ 330 KB

## Abstract Application of the lanthanide shift reagent Eu(fod)~3~ to a series of benzylideneanilines causes isomerization of the stable __trans__ form to the less stable __cis__ form. A linear relationship was obtained between the % __cis__ isomer with the mole ratio of Eu(fod)~3~/substrate.

Use of lanthanide shift reagents to prob
✍ Miquel Pons; Dennis Chapman 📂 Article 📅 1986 🏛 John Wiley and Sons 🌐 English ⚖ 460 KB

The conformational analysis of short polymer chains involves the use of statistical models, and their predictions must be checked against experimental information. Ytterbium-induced shifts in the "C NMR spectra of fatty acids provide a non-perturbing, straightforward method of simultaneously obtaini